Cells and Organelles 0.0 / 5 ? MedicineMedicineUniversityNone Created by: alishaknapmanCreated on: 04-04-19 18:43 Name examples of large cells? Bird egg, Neuron, Algae, some bacteria 1 of 29 Cells have a large SA/VOL ratio what does each account for? Volume: Amount of chemical activity SA: Amount of substance that can pass through the cell at a time 2 of 29 What are the features of the plasma membrane? Selectively permeable bilayer, Has proteins for binding, Important in communication and receiving signals, helps cells maintain constant environment 3 of 29 What does the flagellum do? Helps cell move 4 of 29 What does Pili doe Helps cell adhere to other cells 5 of 29 What is compartmentalisation? In Eukaryotic cells the cells will specialise to become a specific tissue or organ. 6 of 29 What does cell fractionation do? Separates organelles 7 of 29 Where are ribosomes in prokaryotic cells? Free in cytoplasm 8 of 29 Where are ribosomes located in eukaryotic cells? Mitochondria, Attached to ER, Chloroplast, Free in cytoplasm 9 of 29 Main features of the nucleus? Contains DNA, Site of DNA replication, Site where DNA transcription can be turned off or on, 10 of 29 What is the feature of a nuclear pore? Controls movement of molecules from cytoplasm to nucleus 11 of 29 What makes up chromatin DNA + Protein 12 of 29 Function of nucleoplasm? Surrounds chromatin to help organise it. 13 of 29 Function of nuclear lamina? Attaches to chromosomes to maintain shape 14 of 29 What is the endoplasmic reticulum and what is its function? Network of interconnecting membranes, it chemically modifies small molecules such as drugs. 15 of 29 What is the rough endoplasmic reticulum and what is its function? Has ribosomes attached and modifies newly made proteins, hydrolyses glucose and synthesises lipids. 16 of 29 What is the function of Golgi Received proteins from RER to further modify, concentrates, packages and sorts proteins 17 of 29 What does the CIS region do? Receives vesicles from ER 18 of 29 What does the Trans region do? Vesicles are moved from Golgi to other organelles. 19 of 29 Where do primary lysosomes come from? Golgi 20 of 29 Food enters the cell as a phagosome what happens next? Secondary lysosomes hydrolyse food. 21 of 29 Properties of mitochondria? Produces ATP 22 of 29 What is in the matrix? DNA, Ribosomes, enzymes. 23 of 29 What is the function of cristae? Inner membrane gives large SA 24 of 29 What does the Chloroplast do? Site of photosynthesis 25 of 29 What is the Grana? Stack of Thylakoids 26 of 29 What is the Thylakoid? Contains chlorophyll + pigments that harvest light energy. 27 of 29 What is a chromoplast ? Gives colour to plant 28 of 29 Leucoplasts? Store fat and starch 29 of 29
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